Arrow nock



FIG. 1 is a view in perspective of an arrow nock showing our design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a view in right side elevation thereof, the left side elevation being identical;

FIG. 4 is a front elevation thereof, the rear elevation thereof being identical; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an arrow nock, as shown and described. 